Ellison committed to Arizona on Tuesday afternoon.
"I feel like Arizona is a place where I can be successful as an athlete and as a person," said Ellison.
Ellison said the coaches played a big role in his decision.
"What made the decision was I felt comfortable around the coaching staff and they made me feel welcome," said Ellison.
Ellison helped Granite Bay win the CIF State D-I title last year, playing running back and receiver, and he'll play receiver for the Wildcats.